<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>轮转数组</title>
</head>

<body>
  <script>
    function arr(nums, k) {
      for (let i = 1; i <= k; i++) {
        nums.unshift(nums[nums.length - i]);
      }
      nums.splice(nums.length - k, k)
      return nums
    };
    console.log(arr([1, 2, 3, 4, 5, 6, 7], 3));
  </script>
</body>

</html>